include/linux/of_irq.h

   1 #ifndef __OF_IRQ_H
   2 #define __OF_IRQ_H
   3
   4 #include <linux/types.h>
   5 #include <linux/errno.h>
   6 #include <linux/irq.h>
   7 #include <linux/irqdomain.h>
   8 #include <linux/ioport.h>
   9 #include <linux/of.h>
  10
  11 typedef int (*of_irq_init_cb_t)(struct device_node *, struct device_node *);
  12
  13 /*
  14  * Workarounds only applied to 32bit powermac machines
  15  */
  16 #define OF_IMAP_OLDWORLD_MAC    0x00000001
  17 #define OF_IMAP_NO_PHANDLE      0x00000002
  18
  19 #if defined(CONFIG_PPC32) && defined(CONFIG_PPC_PMAC)
  20 extern unsigned int of_irq_workarounds;
  21 extern struct device_node *of_irq_dflt_pic;
  22 extern int of_irq_parse_oldworld(struct device_node *device, int index,
  23                                struct of_phandle_args *out_irq);
  24 #else /* CONFIG_PPC32 && CONFIG_PPC_PMAC */
  25 #define of_irq_workarounds (0)
  26 #define of_irq_dflt_pic (NULL)
  27 static inline int of_irq_parse_oldworld(struct device_node *device, int index,
  28                                       struct of_phandle_args *out_irq)
  29 {
  30         return -EINVAL;
  31 }
  32 #endif /* CONFIG_PPC32 && CONFIG_PPC_PMAC */
  33
  34 extern int of_irq_parse_raw(const __be32 *addr, struct of_phandle_args *out_irq);
  35 extern int of_irq_parse_one(struct device_node *device, int index,
  36                           struct of_phandle_args *out_irq);
  37 extern unsigned int irq_create_of_mapping(struct of_phandle_args *irq_data);
  38 extern int of_irq_to_resource(struct device_node *dev, int index,
  39                               struct resource *r);
  40 extern int of_irq_to_resource_table(struct device_node *dev,
  41                 struct resource *res, int nr_irqs);
  42
  43 extern void of_irq_init(const struct of_device_id *matches);
  44
  45 #ifdef CONFIG_OF_IRQ
  46 extern int of_irq_count(struct device_node *dev);
  47 #else
  48 static inline int of_irq_count(struct device_node *dev)
  49 {
  50         return 0;
  51 }
  52 #endif
  53
  54 #if defined(CONFIG_OF)
  55 /*
  56  * irq_of_parse_and_map() is used by all OF enabled platforms; but SPARC
  57  * implements it differently.  However, the prototype is the same for all,
  58  * so declare it here regardless of the CONFIG_OF_IRQ setting.
  59  */
  60 extern unsigned int irq_of_parse_and_map(struct device_node *node, int index);
  61 extern struct device_node *of_irq_find_parent(struct device_node *child);
  62
  63 #else /* !CONFIG_OF */
  64 static inline unsigned int irq_of_parse_and_map(struct device_node *dev,
  65                                                 int index)
  66 {
  67         return 0;
  68 }
  69
  70 static inline void *of_irq_find_parent(struct device_node *child)
  71 {
  72         return NULL;
  73 }
  74 #endif /* !CONFIG_OF */
  75
  76 #endif /* __OF_IRQ_H */